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You have already activated X, but your Gemfile requires Y

...is. Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get any warning when simply using rake. Yehuda Katz (one of the origi...
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Generate Java class from JSON?

...t. It's still in draft (not finalised) but it's close to completion and is now a viable tool specifying your structural rules I've recently started a new open source project specifically intended to solve your problem: jsonschema2pojo. The jsonschema2pojo tool takes a json schema document and gener...
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How to set the environmental variable LD_LIBRARY_PATH in linux

...ding local libraries, and you've added both of them to /etc/ld.so.conf.d. Now user A can link to user B's local libraries. Not good. – ergosys Nov 1 '13 at 7:26 ...
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Spring Data JPA - “No Property Found for Type” Exception

...sitory classes/interfaces should be placed in one directory - as far as I know – Błażej Kocik Nov 30 '17 at 13:01 ...
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Scala actors: receive vs react

...es something, a thread gets allocated to it, and it is initialized in it. Now, the initialization part is important. A receiving thread is expected to return something, a reacting thread is not. So the previous stack state at the end of the last react can be, and is, wholly discarded. Not needing t...
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How to check if a variable is a dictionary in Python?

... in try...except (AttributeError, TypeError). If exception is raised, you know ele has no items that yields an iterable... – cowbert Jul 14 '18 at 3:31 ...
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What to do Regular expression pattern doesn't match anywhere in string?

... # ...except for the />, which is grabbed here )/xgm; # Now each member of @input_tags is something like <input type="hidden" name="SaveRequired" value="False" /> foreach my $input_tag (@input_tags) { my $hash_ref = {}; # Now extract each of the fields one at a time. ...
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How is “int* ptr = int()” value initialization not illegal?

... @NeilG: This stays the same in C++11, though there is now also a nullptr, which you can use instead of 0 or NULL in new code. – Jerry Coffin Nov 9 '11 at 23:02 ...
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Moving average or running mean

... each position in the window, are sometimes called the convolution kernel. Now, the arithmetic mean of N values is (x_1 + x_2 + ... + x_N) / N, so the corresponding kernel is (1/N, 1/N, ..., 1/N), and that's exactly what we get by using np.ones((N,))/N. Edges The mode argument of np.convolve speci...
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Generate table relationship diagram from existing schema (SQL Server) [closed]

... etc. just by pressing one single button. I use the free version for years now. share | improve this answer | follow | ...